The Human Phenotype Ontology (HPO) provides the following list of features that have been reported in people with this condition. Much of the information in the HPO comes from Orphanet, a European rare disease database. If available, the list includes a rough estimate of how common a feature is (its frequency). Frequencies are based on a specific study and may not be representative of all studies. You can use the MedlinePlus Medical Dictionary for definitions of the terms below.
| Signs and Symptoms | Approximate number of patients (when available) |
| Hypopigmentation of hair | 90% |
| Hypopigmented skin patches | 90% |
| Premature graying of hair | 90% |
| Abnormality of lipid metabolism | 50% |
| Abnormality of neutrophils | 50% |
| Decreased antibody level in blood | 50% |
| Leukopenia | 50% |
| Lymphadenopathy | 50% |
| Thrombocytopenia | 50% |
| Abnormality of movement | 7.5% |
| Abnormality of temperature regulation | 7.5% |
| Abnormality of the eyebrow | 7.5% |
| Ascites | 7.5% |
| Bone marrow hypocellularity | 7.5% |
| Cerebral cortical atrophy | 7.5% |
| Cognitive impairment | 7.5% |
| Cranial nerve paralysis | 7.5% |
| Edema of the lower limbs | 7.5% |
| Encephalocele | 7.5% |
| Hepatomegaly | 7.5% |
| Hydrocephalus | 7.5% |
| Hypertonia | 7.5% |
| Incoordination | 7.5% |
| Muscular hypotonia | 7.5% |
| Nystagmus | 7.5% |
| Ocular albinism | 7.5% |
| Seizures | 7.5% |
| Short stature | 7.5% |
| Splenomegaly | 7.5% |
Making a diagnosis for a genetic or rare disease can often be challenging. Healthcare professionals typically look at a person’s medical history, symptoms, physical exam, and laboratory test results in order to make a diagnosis. The following resources provide information relating to diagnosis and testing for this condition. If you have questions about getting a diagnosis, you should contact a healthcare professional.
Research helps us better understand diseases and can lead to advances in diagnosis and treatment. This section provides resources to help you learn about medical research and ways to get involved.
These resources provide more information about this condition or associated symptoms. The in-depth resources contain medical and scientific language that may be hard to understand. You may want to review these resources with a medical professional.
